Presentation to IENE · 2018-10-12 · circulation, heat recovery steam generator (HRSG)...

Presentation to IENEPresentation to IENE

November 2010

General Information

Elpedison Power S.A. (formerly named T-Power S.A.) is a company jointly

established by the groups of EDISON (Italy) HELLENIC PETROLEUM,

ELLAKTOR and HALCOR, which represent distinguished groups of companies

being leaders in their fields of activation, with a remarkable financial strength and

know-how that enables Elpedison Power S.A. to develop, finance, construct and

operate large scale Power generation Plants.

Elpedison Power S.A. already possesses and operates Thessaloniki CCGT

Power Plant since 2006. T-Power is the first independent producer of electrical

energy in Greece with an installed capacity of approximately 390 MW. The Powerenergy in Greece with an installed capacity of approximately 390 MW. The Power

Plant uses the proven Combined Cycle Gas Turbine technology, it uses natural

gas as fuel, and also implements innovative technology in the areas of control

and production automation.

Additionally the company has finalized the commissioning of Thisvi CCGT Power

Plant in the Industrial Zone of Thisvi, in Viotia Prefecture. The Power Plant has an

installed capacity of approximately 420 MW and use the CCGT technology . The

commencement of commercial operation of the Plant is planned for December

2010.

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General Information

� The total investment cost of both power plants had reached the amount of

500mln euros around

� Thessaloniki plant was in operational since 2005 (December) and Thisvi’s plant

COD is expected within December 2010

�Headcount: 62

�HQ: 7

�Thessaloniki: 33�Thessaloniki: 33

�Thisvi: 22

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5%

SHAREHOLDERS

General Information

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THESSALONIKI CCPP 390MW

THISVI CCPP 390MW

1. Retail 2. Trading (cross border trading

with interconnected countries)

Investment Cost

260mln euros

Investment Cost

275mln euros

Thessaloniki Power Plant 390MW

CC Power Plant Details & Description:

Gas Turbine and Generator

� The primary energy source for power generation is a single 250 MW GE 9FA Gas Turbine normally fired on natural gas, but also with the capability of burning diesel.

� The power output shaft is solidly coupled to a hydrogen cooled generator rated at 50 Hz / 15.75 kV / 324 MVA / 0.85 pf.

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� Power output from the generator is routed to the common generator step-up transformer.

� The turbine and the generator are fully enclosed within acoustic enclosures with CO2 gas flood protection, forced ventilation and gas and heat detection systems.


Heat Recovery Steam Generator

� The gas turbine exhausts into a triple pressure, vertical gas flow, heat

recovery steam generator manufactured by CMI.

� There is no exhaust gas bypass facility but the steam turbine can be

bypassed to the condenser for short periods during start up, thus simple

cycle operation is not possible.

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Steam Conditions:

Temp °C Pressure Bar Flow

tn/hr

HP 566.7 124.51 272.5

IP 566.7 26.10 319.0

LP 277.2 4.60 337.0


Steam Turbine and Generator

� Steam, generated in the HRSG, is supplied to a separate, 3 stage

140MW steam turbine manufactured by Franco Tossi. Steam from LP

stage exhausts to a twin pass condenser. Condenser has titanium tubes

and is fitted with a circulating ball tube cleaning system.

� The steam turbine is solidly coupled to an air cooled generator rated at

50Hz/15kV/166MVA/0.85pF.

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50Hz/15kV/166MVA/0.85pF.


Transformer and Electric System

� The output from both generators is connected to a common 3 winding,

oil filled, step-up transformer manufactured by ELIN.

� The transformer steps up the generated voltage to 400 kV and is rated

at 460/295/165MVA.

� The transformer is equipped with a water deluge protection system.

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� The transformer is equipped with a water deluge protection system.


Cooling Water System

� Cooling water system consists of a 10 cell forced draught cooling

tower and 3 vertical pumps that circulate cooling water to the condenser.

� Sea water is used as make-up at a rate of 1450 m3/h. 1200 m3/h is

required to replace salinity control blow-down and 250 m3/h to replace

evaporative loss.

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� An on-shore pump station located 7.5 km from the power plant

supplies sea water to the cooling system through a 600 mm GRP intake

line. Blow-down is returned to the sea through a 600 mm outfall line.


Water Treatment System

� A vapor compression sea water desalination plant procedures distilled

water.

� Distilled water is used as service water, fire fighting water and feed to

the water treatment plant that produces boiler make-up water.

� Water treatment plant is a conventional anion / cation mixed bed

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� Water treatment plant is a conventional anion / cation mixed bed

exchanger system with acidic and caustic regeneration systems.


Fuel Supplies

� Natural gas is taken from the national gas grid which is owned and

operate by DEPA.

� The metering station located at the power plant, consists of two x

100% duty metering trains. Each train includes filter-separator, heater,

pressure regulator, turbine meter and on line gas chromatography

system.

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� The plant has also the capability to operate on liquid fuel (diesel).


Cable Connection to the 400 KV grid

� Electrical power, at 400kV, is exported from the on site switch yard to

the national power grid 4,5 km away, via 3 underground XLPE cables

laid in PVC cable ducts

� The 400 kV XLPE cable system is the first cable system ever installed

in Greece, and it proved to be a challenging project due to the innovative

technology applied

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� The underground cable system was designed and installed by ABB-

SUEDKABEL

Thisvi Power Plant 420MW



� The primary energy source for power generation is a single 275 MW Ansaldo Energia type 94.3A4 Gas Turbine normally fired on natural gas, but also with the capability of burning diesel.

� The power output shaft is solidly coupled to an Ansaldo type TRY-L56 air cooled generator rated at 50 Hz / 18 kV / 325 MVA / 0.85 pf.

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� Power output from the generator is routed to a dedicated step-up transformer(T2) manufacturer by Tamini, rated 340MVA at 15oC ambient.

� The turbine and the generator are fully enclosed within acoustic enclosures with CO2 gas flood protection, forced ventilation and gas and heat detection systems.


Heat Recovery Steam Generator

� The gas turbine exhausts into a triple pressure, horizontal gas flow and natural

circulation, heat recovery steam generator (HRSG) manufactured by Nooter

Eriksen.

�HRSG is equipped with hot/cold reheat circuit and with two element post firing

burner, using natural gas to increase the plant output of 14MW, at 15oC ambient

temperature.

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� There is no exhaust gas bypass facility but there are 3 by-pass station, which

allow to by-pass 100% the steam turbine. This protects the gas turbine by tripping

if steam turbines trips.

Steam Conditions: Temp °C Pressure Bar Flow tn/hr

HP 568 135.8 283.6

CRH 369.9 34.5 276.6

IP 306.5 34.5 56.1

HRH 568 32.9 336.2

LP 300 4.63 45.9


Steam Turbine – Generator and Air Cooled Condenser

� Steam, generated in the HRSG, is supplied to a separate, 3 stage

145MW steam turbine manufactured by Ansaldo Energia, type RH-

TCSF 43.

�Steam from LP exhaust pass to an air cooled condenser (ACC), by

GEA Energie-technik GmbH. Condenser is equipped with 21 cell, in an

arrangement of 3 row. ACC is equipped also with an external tube

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arrangement of 3 row. ACC is equipped also with an external tube

cleaning system.

� The steam turbine is solidly coupled to an Ansaldo type WY21Z-092 air

cooled generator rated at 50Hz /16kV /192MVA /0.85pF.

� Power output from the generator is routed to a dedicated step-up

transformer(T1) manufacturer by Tamini, rated 190MVA at 15oC ambient.



� The transformers (T1 and T2) step up the generated voltages to 400

kV.

� Each transformer is connected with independent over head lines to the

PPC substation.

� Both transformers are equipped with a water deluge fire protection

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� Both transformers are equipped with a water deluge fire protection

system.


Closed Cooling Water System

� Closed cooling water system consists of a 14 cell forced air cooling

tower, 2 main pumps and an emergency DC pump for circulating cooling

water to users.

�Tower is arranged in two rows, each of 7 fans in row

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Water Treatment System

� Water from Mornos channel feeds the plant for its needs. First

treatment is done by passing through sand filters.

� Demineralization plant consist of 2x100% production lines with

capacity of 10m3/h. Each consists of a cation tower, de-carbonization

tower , anion tower, mix bed and final ultra filtration system.

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Fuel Supplies

� Natural gas is taken from the national gas grid which is owned and

operate by DEPA.

� Plant gas station consists of double filtering lines, single metering

station, and double pressure regulation lines for gat turbine and

aux.boiler.

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�A gas chromatograph system is installed after the pressure reduction

station and before the gas turbine.

� The plant has also the capability to operate on liquid fuel (diesel),

using propane as ignition gas.


Cable Connection to the 400 KV grid

� Electrical power, at 400kV, is exported through the on site switch yard

to the national power grid. Plant switchyard is a tie-in tie-out

configuration.

� A power line has been constructed for the purpose to extend the grid

network and reach Thisvi substation. Total number of towers are 65.

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Presentation to IENE · 2018-10-12 · circulation, heat recovery steam generator (HRSG)...

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